Water-tube boiler.



J. E. BELL. WATER TUBE BOILER.

APPLIOATION FILED NOV. 7, 1905.

1,079,391. 7 Patented Aug. 19, 1913.

4 SHBETSSHEET 1.

' ENVEEIETOR wumessss J.E.BELL.

WATER TUBE BOILER.

APPLICATION FILED NOV- 7, 1905.

Patented Aug. 19, 1913.

4 SHEETS-$HBET 2.

WITNESSES J. E. BELL.

WATER TUBE BOILER. APPLICATION rILnnNov. 7, 1905.

19mm 310 Q Patented u 19, 1913 4 SHEETS-SHEET 3.

KWETPMES8E$ INYENTOR W lla 14w I J. E. BELL.

WATER TUBE BOILER.

APPLIGATION FILED NOV. 7, 1905.

Patented; Aug. '19, 1913,

wmsm.

4 SHEETS-SHEET 4.

WITNESSE5 I UNITED s'rnf'rns carrier orricia J'QHN E. BELL, on NEW YORK,1v. 1., ASSIGNOB To run BABCOCE a wrncox comranr, or NEW YORK, N. Y., aCORPORATION or new annsnr.

WATER-TUBE BOILER.

Specification of Letters Patent.

Patented Aug. i'ltli, li t n Application filed November 7, 1905. SerialNo. fitifidiit.

To all whom it may concern:

Be it known that I, J OHN E. BELL, of the city of New York, State andcounty of New York, have invented certain new and useful Improvements inWater-TubeBoiL 'ers, of which the following is a full, clear, and exactdescription, reference being had to the accompanying drawings, formingpart of this specification, in which- Figure 1 is a side elevationshowing one form of boiler structure in accordance with my invention;Fig. 2 is a front elevation of the same: and Figs. 3 and i are viewssimilar to Fig. 1, showing other forms of the invention.

My invention relates to water-tube boilers and especially to those ofthe horizontal type, wherein the-tube-heating surface extends in a'general horizontal direction, usually between the horizontal plane and45 degrees thereto. Heretofore, such type of boiler, of which theBabcock v8a Wilcox boiler and Heine boiler and the Root boiler areexamples, the number of rows of tubes have a certain proportionaterelation to the.

heating surface to give good eihciency; and increase in the gratesurface should be accompanied by correspondingincrease in the heatingsurface, WillCl1,-l1OWB\ 'Cl, must be limited as above described. I

My invention overcomes ihrse diiiiculties. and provides a horizontalwater tube boiler of great capacity, while occupying a comparativelysmall amount of floor space. The invention consists in independentlyconnecting one or more sets-i or rows of lowerwater tubes adjacent tothe f rnace to the-steam and water-drmn or drums. at one or both ends,preferably thc'up-current ends; the tubes above these lower tubes havingconnection to the steam and waterdrum or drums independent of theconnection for the lower tubes. The lip-currents from the lower tubes,which are otherwise liable to be burnt out, are' thus given a freer exit.to the steam and water-space and are not choked back by minging withand passing through the Water from the upper tubes. The inventionfurther contubes 17. 1a. to a bridge sists in an improved arrangement ofbaffles which is suitable for any horiiiontal water tube boiler, thoughespecially adapted to my improved boiler.

in the drawings, referring to the form of Figs. 1 and "2, l show ahorizontal water-tube boiler having a lower set of inclined tubes 2 andan upper set of inclined tubes 3. The lower tubes are connected at oneend, (in this case the rear end) to -vertically-extending headers 4:,which may be of the ordinary zig-zag or serpentine type; and the upperends of these headers are connected by pipes or nipples 5 to the saddle6 of a steam and. water-drum 7 which I have shown as Xtendinglongitudinally of the boiler. The steam and water-drum, may, however.extend transversely of the boiler and be located above either end; or 1more than one steam and water-drum may i be employed.

The upper set of tubes 3 is shorter than the lower set and at one endthey.are connected to vertical headers 8, which are connected by nipples9 to a second'saddle 10 of the steam and water-drum 7. The opposite endsof the tubes 3 are connected tov vertical headers 11, having at theirupper 'ends nipples 12 connecting to saddle 13.

The headers 11 preferably extend. downwardly far enough to receive allof the tubes 3 and are ed at their lower ends to a lower corrc p ng setof headers Li receivii'ig theends o. the lower set of water The headers11 may be arranged to receive the ends of all the tubes of both sets.

i have shown two sets of grates 15 and ill, extending from the front andrear walls wall 19,1llflllfi@fl transversely at on intermediate point.Fire doors ill: provid d at both ends of the setting in shown. thegrates errtending unu-erneatn substantially the whole of the boiler. Thelire-doors may. however. he placedat one or both ends of the setting andthe gratesi'nay extend beneath. any desired portion or portions of theheating surface.

The battling may be of any type. In the form of Figs. 1 and 2 I haveshown a lower horizontally-extending baffle 21, lying on the lower rowof wateriubes and another horizontal balile 22 (ex-- tending from theoppos te end and lying desirable fit? ni h

on the upper row of the lower set of tubes At the end of the b aille evertical battle 23 leaving port at its upper cud, amid a depending,belile 24- is preferably placed between the baflie 23 and the uptsite25. The flames and gases are thus given a tortuous course along; andacross the Waiter-tubes. iihc space between the' heeders 8 for the upperset of tubes 3 and the pipe counec- E-tor the correspondmgheuders of thelow set oi tubes is preferably large enough tool-tow entrance of a menthrough. the side wall ofthe'setting. For this purpose a doc-:4;- ord-oorsfifi may be used in the side wall or walls, through which the menceu enter to expend. the tubes or remove and replace iii the operationof the boiler the Water sud steam in vthe lower tubes flow into theheaders time thence through the pipe cou sections -5 directly into thesteam and water-drum, where the steam is released. A rapid circulationmay thus be provided iii the lower set of tubes which is nearest thefurnace end is most liable to be burnt out. up circulation of steam andwater passes upwardly separate from. the lugs-circulation of the tubes 3the latter puss iug up through the headers 8 and nipples 9,2116.descending through. the headers ll and 14:. I. do not consider itnecessary to employ separate connections for the two sets of tubes 2 end3 at this end of the boiler. Separate headers and connections may,however be used for the sets of tubes at one or both ends within thescope of my broader claims, although the main adventeges of my inventionflow from the seporots con iiectious git the up-curreut ends. L its theupper set of tubes is subjected to the furnace gases after they haveparted with u portion oft their heat, can steel: the uows oi tubes oithis upper set above each other t'o'ci y'desireole height Within.practicol Without danger of burning out the lowcs tu how u similarto'thst mt bellli V form t tslly-estteuumg, the 27, end 2"!" beiii .u tothe bsiliss 21*- g a. of the gases will be someereut' this form, butotherwise tielly the in the first term,-

. up-currents of Water from lower tubes passing though their ownindependdrum.

in. F {2 I show u form of. Fig. 1.. except the"; I inclined i i t eUp'pvsiig the lo er ell i P have,

.euy desired shape or size. The tubes out connections to the steam. andWdi r.

soc/e cort .l, except with the letter b annexed thereto, the nipples 9arclonger than nipples 12"; instead oi usiug two sets of tubes withseparate conuecti 21s to the steam and Water-drum at one end, I mayemploy three or more sets, each. set preferably having itsownindependeint connection to the steam and Wsteudrum or drums at oneend, or both ends, if desired. 4 The advantages of myinvention resultfrom the separate ceimection of the lower tubes with the steam andWatesspeoe; since thereby the amount of heating surface and, gratesurface can be increased withoutincreasing floor space and Withoutliab.il ity of burning out the lower tubes. A rapid circulation may takeplece'through these lower tubes, since the up-currents of thisupcirculation pass directly to the steam and Witter-drum or drums. Theupper set or sets of tubes may be stacked up to any desirable heightsince there is little or no danger of burning out such tubes. A. verylarge amount of heating surface may thus be provided and the gratesurface may be made correspondingly large by increasing the grateareaeven to covering substantially the whole of the floor spaceoccupied. The bufiling, bye horizontal pass among the tubes, followed byvertical posses, (gives eliicieut extraction of heat. 1. 4 v Instead ofthe ordinary headers at the ends of the tubes, I may employ a water; legor legs such as in the Heine,typeo1 boiler, or I may use boxes ormanifolds of may be divided into two or more sets and the upper may setus on economiser or feed- Water heater.

The-upper set or sets of tubes may have the some inclination as thelower set or] tubes, or may be inclined. at 2. different angle, orreversely inclined. The furnace may fired fromoue or both ends end theumy extend. below any part well of the boiler. The separate connectionsiior the sets of tubes may be used at either or both ends and anydesired type of bottle may be used. hsviu; the ppes or hip- "0.111headers orbo zes to the steem and u'stei druui or drums may to asiutermcdiete box, chem Focr or chambers, W

ii iii turn is connected to the steoui snci water-drum or drums. u owertie-file be shove one or more 129 rows of tubes or supported below thislowermo t row of tub-9s.

e, 1 .1.1 nn f1 gym. Question Juli aputo. .0 e1 .ez. 31c boilers orbojxlcis oi: the land pe. other vorotioiis may be .iuude m IOlliil. itme: i the, vein us. pipes, Without do than.

- sectional men of the circulating tubes con nected to the uptakeheaders of the lower bank being less than the combined ci'oss sectionalarcs of the tubes of the lower bunk,

substantially as described.

2. A steam boiler having a steoni end water drum, two banks of inclinedtubes, one above the other, the tubes of the-lower bank-being lonoerthan the tubes of the upper hank, heu en's connected to both ends 3 ofthe vtubes v ofhoth banks, the downtohe headers of the lower bank beingdirectly be low the "headers at one end of the upper bunk, circulatingtubes connected to said headers of both be kgccirculating" tubes to theheaders of the eper bunk end the drum, and circulating" tubes connectedto the headers at the uptake end of the lower hunk and the drum, thecross sectional area of the lastmentionedltubes being less than thecombined cross sectionul area :of the tubes of the lower bank,substantially as de scribed. v f

3. A steam boiler having a, steam end water drum, two banks of inclinedtubes, one above the other, the tubes of the lower bank being longerthan the tuhesof the up poi bark, headers connected to both ends of thetubes of both banks, the downteke headers of the lower bunk beingdirectly be low the headers at one end of the upper bunk,cirouletingtubes connected to said headers of both banks, circulatingtubes to the headers of the. upper bank and drum, circulating tubesconnected to the hecders at the uptake end of the lower hunk end thedrum, the crosssectional arcs of the lost mentioned tubes. being lessthan the com bined cross sectional area of the tubes of the lower bunk,o longitudinally disposed beilie above the upper row of tubes of thelower hunk, and a long; -dinelly disposed haflie above the lower row oftubes oi the lowev bani-i, their; being suilicient space hetwecn haihesto permit all of the prod nets of combustion to pose longitudinallyalong the tubes of the lower hunk, echelontielly as described i, A steamhof having it end water drum, unis of inclined tubes, one above theother, the tubes of the lower testimony per 'bei'zk, heeders connectedto both ends of the tubes of both banks, the downteke' headers of thelower hank being" directly be-- low the headers zit one end of the upperbunk cii'culetin tubes connected to said headers of, both banks,circulating tubes to the headers of the upper bank and the ileum,circulating tubes connected to the headers at the unto/lie end of thelower bank end the drum, the cross sectional area of the lustnientionedtubes being less then the coinln'ned cross sections arcs of the tubes ofIShc lower bank, a. longitudinally disposed bottle above the upper rowof tubes of the lower bunk, 2i longitudinally disposed baffle [above thelower row of tubes of the lower bank, there being sufiicient spacebetween said hoffies to permit all oi the products of.

combustion to pass longitudinally along the tubes of the lower bank, anda plurality of vertically disposed cross bodies to? the up-- per ban oftub-es, sold bellies giving the gases three passes across said hank oftubes, substantially as described 5. A water tube boiler homing u steamand wetei' drum, two banks of inclined tubes,

one above the other and lying wholly with in the casing, the tuhcs ofthe lower bunk being of 'ieetei' length then those of the upper beiihwhereby a space is left above the uptake end oi the lowcrrbenk back ofthe uptake headers of the upper hank, headers into which the ends of thetubes are expended, the downtoke headers of the two bunks being nippledtogether or continuous and those of the upper honh' connected to thewater space or? said drum, independent tubular connections from theuptehe heodei's to cold drum, n longitudinal bei tle supported onthelowermost row of tubes oi the lower bonk and. extending from thedowntoke heed-er, ported upon the uppermost row of tubes oi" the lowerbank and extending from the uptake header of said benlz overlapping "thelower beille, whereby call of the products of combustion caused to passlongitudinully oi the tubes of lower hunk, tronsverse heiiies dividingthe upper bent: into a plumlity oi? transverse posses heginning ut thedowntehe end, said tubules connections having; less cross sectional areathan the combined cross sectional ores ofthe tubes ot the lowermosthank,

l have hereunto set my hendQ d ll'isiii .hl. BELL itiieei res lite nsecond lon itudinel hefile su i- Mill

